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M. M. NICHGLLS.A

TUBING.

No. 568,870. Patented Oct. 6, 1896.

IN VEN TUR '.4 TTOBNEYS.

, WITNESSES:

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UNITED STATES PATENT OFFICE.l

MARK M. NICHOLLS, OF NEW YORK, N. Y.

TUBING.

SPECIFICATION forming part of Letters Patent No. 568,870, dated October 6, 1896.

Application filed April 28, 1896.

To a/ZZ whom it may concern:

Be it known that l, MARK M. NIcHoLLs, a resident of the city, county, and State of New York, have invented certain new and useful Improvements in Tubing, of which the following is a specication.

My invention relates to flexible tubing, and is particularly adapted for use as a means for conveying gas.

In tu bin g of this character heretofore made it has been customary to coat a coiled spring contained within the said tube with a layer or film of boiled linseed-oil and to interpose a layer or film of the linseed-oil between the internal coiled spring and a layer of compound made up of glue and glycerin. The purpose of the layer or film of linseed-oil was to prevent gas from penetrating the walls of the tubing and to prevent the coiled spring forming part of t-he tubing from rusting or corroding by contact with the moisture-laden gas passing through the tube. Great objection has been found in tubes of this character, because it was found that the linseed-oil would dry and harden and in drying would draw the moisture from the layer of glue and glycerin, so that it would become hard, and an attempt to bend the tube would result-in its being broken and rendered unfit for further use. These tubes dry and crack much more rapidly when in stock than when in actual use, since the interior of the tubes are in open communication with the atmosphere when they are in stock, which of course is not the case when the tubes are in use.

The object of my invention is to overcomeY Serial No. 589,375. (No model.)

tion wherein an internal coiled spring A is coated with, or partly or wholly embedded in, a layer B of Venetian red and cotton-seed oil mixed in about equal proportions by Weight, so as to form a composition of doughy-like consistency. Surrounding this coiled spring is preferably arranged a textile body-sheath a, which may become saturated with and through which may pass a portion of the Venetian red and cotton-seed oil, so that it may form a thin filmA b upon the outer face of the textile sheath a, as represented by the stippled surface in Fig. l.

A layer C of suitable thickness, composed of glue and glycerin, incloses the textile sheath a and the iilm b, thereon, and this layer of glue and glycerin may, if desired, .be covered with an exterior textile covering c, or the compound may have a suitable pigment incorporated therewith and itself form the outer covering.

In my improved tubing the layer of Venetian red and cotton-seed oil practically never becomes dry or hard and is impermeable to either gas or moisture, so that it prevents the coiled spring A, coated With or embedded therein, from rusting or becoming corroded. At the same time there is nothing to draw the moisture from the layer of glue and glycerin; but on the other hand the lm b of Venetian red and cotton-seed oil prevents the textile sheath a and the layer of glue and glycerin from adhering together and retains the latter in a soft and pliable condition. Furthermore, by my invention I am enabled to manufacture tu bing and immediately place it on sale, thereby avoiding the delay of several days heretofore occasioned in drying the linseed-oil before the tubing could be placed upon the market.

Having described vmy invention, what I claim, and desire to secure by Letters Patent, is-

l. A tubing comprising in its structure a layer composed of Venetian red and cottonseed oil and a layer of glue and glycerin.

2. A tubing comprisinginjits structure an inner layer composed of Venetian red and cotton-seed oil, a layer of glue andrglycerin IOO tile body-sheath, substantially as and for the purposes speoiied.

3. A tubing Comprising in its structure an inner layer composed of Venetian red and 5 cotton-seedoil, a coiled spring embedded therein, a textile body-sheath surrounding saidlayer of Venetian red and cotton-seed oil7 and a layer of glue and glycerin surrounding said textile body-sheath, substantially as and for the purposes speoied.

MARK M. NICHOLLS. Tituesses CHARLES E. SMITH, HARRY M. TURK. 

